<template>
	<div id="root">
		<div class="todo-container">
			<div class="todo-wrap">
				<!-- 向Header中传递一个函数，函数的调用是在App这里 -->
				<MyHeader @addTodo="addTodo"></MyHeader>
				<MyList :todos="todos"></MyList>
				<MyFooter :todos="todos" @checkAllTodo="checkAllTodo" @clearAllTodo="clearAllTodo"></MyFooter>
			</div>
		</div>
	</div>
</template>

<script>
	import pubsub from "pubsub-js" // eslint-disable-line no-unused-vars
	import MyHeader from "./components/MyHeader.vue"
	import MyList from "./components/MyList.vue"
	import MyFooter from "./components/MyFooter.vue"
	export default {
		name:"App",
		components:{
			MyHeader,
			MyList,
			MyFooter
		},
		data(){
			return {
				todos:[
					{id:"001",title:"吃饭",done:true},
					{id:"002",title:"睡觉",done:true},
					{id:"003",title:"打代码",done:false}
				]
			}
		},
		methods:{
			// 添加一个todo
			addTodo(todoObj){
				// 将接收到的 数据存放到数组中
				this.todos.unshift(todoObj)
			},
			// 勾选or取消勾选一个todo
			checkTodo(id){ // eslint-disable-line no-unused-vars
				this.todos.forEach((todo)=>{
					if(todo.id === id){
						todo.done = !todo.done
					}
				})
			},
			// 更新一个todo
			updateTodo(id,title){ // eslint-disable-line no-unused-vars
				this.todos.forEach((todo)=>{
					if(todo.id === id){
						todo.title = title
					}
				})
			},
			// 删除 todo
			deleteTodo(_,id){ // eslint-disable-line no-unused-vars
				this.todos = this.todos.filter((todo)=>{
					return todo.id !== id
				})
			},
			// 全选or全不选
			checkAllTodo(done){// eslint-disable-line no-unused-vars
				this.todos.forEach((todo)=>{
					todo.done = done
				})
			},
			// 清除所有已经完成的todo
			clearAllTodo(){
				this.todos = this.todos.filter((todo)=>{
					return !todo.done
				})
			}
		},
		mounted() {
			this.$bus.$on('checkTodo',this.checkAllTodo)
			this.$bus.$on('updateTodo',this.updateTodo)
			this.pubId = pubsub.subscribe("deleteTodo",this.deleteTodo)
			
		},
		beforeDestroy() {
			this.$bus.$off("checkTodo")
			this.$bus.$off("updateTodo")
			pubsub.unsubscribe(this.pubId)
		}
		
	}
</script>

<style>
/*base*/
body {
  background: #fff;
}

.btn {
  display: inline-block;
  padding: 4px 12px;
  margin-bottom: 0;
  font-size: 14px;
  line-height: 20px;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2), 0 1px 2px rgba(0, 0, 0, 0.05);
  border-radius: 4px;
}

.btn-danger {
  color: #fff;
  background-color: #da4f49;
  border: 1px solid #bd362f;
}
.btn-edit {
  color: #fff;
  background-color: #00FFFF;
  border: 1px solid rgb(103,159,180);
  margin-right: 5px;
}

.btn-danger:hover {
  color: #fff;
  background-color: #bd362f;
}

.btn:focus {
  outline: none;
}

.todo-container {
  width: 600px;
  margin: 0 auto;
}
.todo-container .todo-wrap {
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 5px;
}







</style>
